Pump for the delivery of liquids in predetermined amounts



T. DI TELLA Nov. .5, 1929.

PUMP FOR THE DELIVERY OF LIQUIDS IN PREDETERMINED AMOUNTS Filed Oct. 18; 1926 2 Sheets-Sheet 2 Patented Nov. 5, 1929 PATENT OFFICE TORCUATO n1 TELLA, or BUENOS AIREs, ARGENTINA PUMP FOR THE DELIVERY OF LIQUIDS IN PREDETERMINED AMOUNTS Application filed October 18, 1926, Serial No.

This invention relates to certain improvements in pumps for delivering liquids in predetermined amounts, particularly gasoline measuring pumps, and it has for its object an improved construction whereby the exact measuring of the amount of liquid to be delivered is obtained and any attempt to tamper with the measuringm'echanism of the pump is prevented. 1O The gasoline measuring and delivering devices actually in use, operated by a plunger of fixed or adjustable stroke, offer several drawbacks. The amounts measured may be readily altered, either by mechanical means of several kinds or by fraudulent operations effected by the persons in charge of the ap paratus, Besides, the measuring device never operates in an exact manner and no means are provided to insure the purchaser as well as the owner the delivery of the correct amounts.

In order to overcome the difficulties above set forth, the delivering pump according to my invention is based on entirely novel prin ciples in apparatus of this description and embodies features entirely its own.

An essential feature of the invention consists in that the counting or registering device is operated by the overflow pipe in its ascending stroke.

The invention further comprises special means for locking the pump in position when the gasoline discharge valve is opened, and means for maintaining such locked condition until the overflow pipe has been returned to its position at zero.

The invention also has for object means for preventing the pump from being operated when the overflow pipe does not 00- cupy one of its predetermined levels, cor responding to predetermined measures registered by the registering device.

The invention also comprises other objects which will appear in the course of this specification and will be particularly pointed out in the appended claims. I

In order that my invention may be readily understood and carriedinto practice without ditficulty, a preferred embodiment of 142,499, and in Argentina August 17, 1926.

the apparatus in its position of delivery, with the rack and pump in their locked positions.

the contents being discharged from the glass reservoir.

Figures 3 and 4 are corresponding views of the apparatus, with the rack and pump released, ready to raise the overflow pipe'to the desired position, and i Figure 5 is a side View of the apparatus witht-he pump released and the overflow pipe locked in position ready for charging the transparent reservoir. a I

In all the said views, the same reference numerals are used to indicate like or corresponding parts.

Referring more particularly to the drawings, 1 indicates a rotary pump of any suitable type which is arranged in a feed pipe 1 leading from a source of supply (not shown) to a glass reservoir 2, the wall of which is marked at various levels to indicate different quantities of gasoline to be delivered. A three-way valve 5 is arranged in the upper portion of pipe 1 to control communication between the latter and the reservoir, and between said reservoir and the discharge pipe 1 connected to the valve casing. The reservoir 2 is equipped with a vertically-movable overflow pipe 3 mounted in a guide tube 4- that opens at its top into said reservoir, the upper end of this pipe coacting with the quantity indicia marked on the reservoir wall.

To operate the pump 1, its shaft has fixed to it a'ratchet wheel 17 provided with a slotted hub engageable by a cross-pin 15 carried by an endwise-movable horizontal shaft 13, so that by moving said shaft in the proper direction the pump willbe clutched thereto and will be driven by the rotation of the shaft. The latter also carries a second cross pin 14 to engage the slotted hub of a pinion l6 that is loose on the shaft to couple the same thereto, the arrangement being such that when one cross pin isengaged the other is disengaged. Pinion 16 meshes with and actuates a vertical reel: 11' which, at its lower and, core- Ill) nected by a cross-piece 12 to the corresuonding end of a vertical rod 30 rigidly secured at its upper end to the overflow pipe 3, in consequence whereof the rotation of shaf 13 will serve to effect the upward or downward movement of the rack and, hence, the adjustment of pipe 3, when the driving pinion a d the shaft are coupled together.

Means are provided for locking the rack ll, and with it the overflow pipe 3, in adjusted position; and in the construction illustrated such means comprise a .detent 18 in the form of a horizontal pin or finger selectively engageable in a vertical series :ofslots 20, 21, 22 and 23 formed transversely through the rack" from side to side thereof at points corresponding, respectively, to the 5, 10, 15 and 20 liter marks on the wall of the glass reservoir. This .cletent is attached to a collar 26k which'is adjustahlysecured to the endwisemovable shaft 13 and is set or positioned by hand to effect the engagement Lof the detent in the selected opening or slot in the rack.

Aset of laterally-projecting lugs or fingers, designated 5., 8, 9 and 10, is also arranged laiongione side facezof the rack slightly above the corresponding openings in position to successively engage the operating element 6 of a register or counter (not shown) during the ascent-of the rack, so that suchelement will be turned or otherwise actuated each time it is struck hy one of said lugs. The aforesaid operating element "6 :is'merely indicated diagrammatically, but the action which takes place will readily he understood.

Considering so much of the apparatus as has been described, the operation is substantially as follows: In the normal position of par s, the pump 1 is uncoupled from the operating shaft, and both the detent'lS and-a second detent 19 hereinafter referred to are disengaged from the rack 11, so that .the latter is free to execute its upward movement when said shaft is rotated, since the pinion 16 is clutched to the shaft by the same movement that unclutches the pump, or by a separa e, or

supplemental movement of the shaft in case at the same time. Assumi for example,

be dispensed, the shaft 13 is then rotated in a hence, the overflow pipe 3,unt1l the to i ot a mark ing 22 in the rack will aline with the deterit l8 lugs '7, 8 and 9. Collar 2% is then moved in adjusted position.

the pins 1% and 15 are so spaced that both may be free from their respective hub slots that 11) liters (3 gallons) of gasoline are to direction to cause the ascent of the racl and, V the latter is exactly in line with the 1 on the reservoir at which time thelo open and the operatnre element- (5 of the counter will have been actuated three times by the ward toengage detent 1 8 in opening 22, thereby locking the rack and the overflow pipe in At the completion of this preliminary or setting operation, shaft 13 is pushed inward to unclutch its pinion 16 and to couple to it, instead, the pump 1. Rotation of the shaft then drives the pump with the result that gasoline is forced through the feed pipe 1 and the then open valve 5 into the reservoir 2 and fills the same until the level reaches the top of pipe 3, any excess gasoline being returned to the main supply through said pipe.

T hereafter, the controlling valve 5 is turned into a position in which it connects the reservoir with the discharge pipe 1 to deliver the gasoline to the purchaser; and this movement of the valve is also utilized to release detent 18 from the rack. For this purpose, the said valve is rigidly connected to an upper norizontal shaft 25 prouided with two arms 26 and 26 he latter of which has pivoted to it the upper end of a rod or link 27 whose lower end is pivoted to one arm of a bell-crank 19'". The previously-mentioned detent 19 is pivoted to the other arm of the hell-'cran r and is disposed exactly in line with the detent 18, so that when the hell-crank is rocked by the rotation of the valve shaft 25, said detent 19 will be moved toward the rack and will enter the opening wherein detent 18 is engaged, forcing out the latter ahead of it. Hence, detent 18 will be released, but detent 19 will continue to keep the rack locked. t the same time, the movementiof the other arm 26 on the valve shaft serves to dis engage its hooked end 26 from the hook 28 on he u Jper end of a vertical rod or link 28 that is pivoted at its lower end to a pawl lever 29, whereupon the parts 28 and 29 drop ,av-ity and the pawl engages ratchet 17 fl locks the pump against action.

to enable iresh operation to be carried out, the valve moved to a position to out out communication with the reservoir, and in so doing the shaft 25 is turned in a-direction to cause arm 26 rod 27 and bell-crank 19' to withdraw detent 19 from the rack which is thereby unlocked, the arm 26 being brought to v ;-ical po Lon. Shaft 13 is then moved outward to uncouple the pump and couple the raclr, and then is turned in a direction to cause said rack to descend to its 0 position, the overflow pipe 3 likewise moving downward and to the same extent. During the last part of this movement, the cross-piece 12 to which the rack and the rod Etlare attached strikes against and depresses the adjacentend of a centrally-fulcrumed lever '31, therehv raising its other end. T he latter end lit) 26 of arm 26, which can be effected by turning shaft slightly in the proper direction, so that the parts are now in readiness for a fresh cycle of operations. I j

Modifications and changes may obviously be made within the scope of'the invention.

I claim:

1. In a liquid dispensing apparatus, a reservoir, an overflow pipe movable thereinto to different predetermined positions corresponding to different definite quantities of liquid to be dispensed, feed and discharge pipes connected with the reservoir, a pump for forcing liquid through the feed pipe into said reservoir, a device for setting the over-- fiow pipe, and a shiftable operating element to selectively operate either the pump or the setting device.

2, In a liquid dispensing ap iaratus, a reservoir, an overflow pipe movable thereinto to different predetermined positions, corre sponding to different definite quantities of liquid to be dispensed, feed and discharge pipes connected with the reservoir, a pump for forcing liquid through the feed pipe into said reservoir, a device for setting the overflow pipe, an operating shaft, and clutch means for alternatively coupling said shaft either to the pump or to the setting device.

3. In a liquid dispensing apparatus, a reservoir, an overflow pipe movable thereinto to different predetermined positions corresponding to different definite quantities of liquid to be dispensed, feed and discharge pipes connected with the reservoir, a pump for forcing liquid through the feed pipe into said reservoir, a device for setting the overflow pipe, a shiftable operating element to selectively operate either the pump or the setting devic and means for positively look ing the pump against action excepting when the overflow pipe occupies one of its predetermined positions.

4. In a liquid dispensing apparatus, a reservoir, an overflow pipe movable thereinto to different predetermined positions corresponding to different definite quantities of liquid to be dispensed, feed and discharge pipes connected with the reservoir, a pump for forcing liquid through the feed pipe into said reservoir, a device for setting the overflow pipe, a shiftable operating element to r-ceiectively operate either the pump or the setting device, means for normally locking r the pump against action, and means for releasing said locking means when the overflow pipe occupies one of the predetermined positions.

5. In a liquid dispensing apparatus, a reservoir, an overflow pipe movable thereinto to differentpredetermined positions corresponding to different definite quantities of liquid to be dispensed, feed and discharge pipes connected with the reservoir, a pump 40y forcing liquid through the feed pipe into the reservoir, a device for setting the overflow pipe, an endwise-movable operating shaft, and means carried by said shaft for coupling it to the pump when moved in one direction and to the setting devicewhen in the other direction.

setting the overflow pipe, an operating shaft,

a loose piniononsaid shaft in mesh with the rack, and clutch means on said shaft for alternatively coupling either the pump or the pinion thereinto.

7. In a liquid dispensing apparatus, a reservoir, an. overflow pipe movable thereinto to different predetermined positions corresponding to different definite quantities of liquid to be dispensed, feed and discharge pipes connected with the reservoir, a pump for forclng liquid through the feed plpe into the reservoir, said pump having a notched hub secured to its shaft, means including a rack for setting the overflow pipe, an operating shaft, a'loose pinion on said shaft meshing with said rack and having a notched hub, and means carried by said shaft for engagement alternatively with either notched hub to couple the shaft to the pump or to the pinion.

a 8. Dispensing apparatus, according to claim 7, in which the coupling means consists of, a pair of spaced pinscarried by the operating shaft, said shaft being movable endwise in one direction to engage one pin with the hub on the pump shaft and in the opposite direction to engage the other pin with the pinion hub.

9. In a liquid dispensing apparatus, a reservoir, an overflow pipe movable thereinto to different predetermined positions corresponding to different definite quantities of liquid to be dispensed, feed and discharge pipes con nected with the reservoir, a single valve to control communication between either of said pipes and the reservoir, a pump for forcing liquid through the feed pipe into the reservoir, a device for setting the overflow pipe, a device for locking the pump against operation, anda separate device for locking the settingdevice against operation, both locking devices being brought into. action automatically consequent upon movement of the valve into position to effect communication between the reservoir and the discharge pipe.

10. In a liquid dispensing apparatus, a reservoir, a vertically-adjustable overflow pipe therein, feed and discharge pipes connected with the reservoir, a single Valve to control communication between either of saidpipes ice its

crevices being brought into ,action automatically consequent upon movement of the valve into position to eliect communication between the reservoir and the discharge pipe.

11. In a liquid dispensing apparatus, a

'reservoir, a vertically-adjustable overflow pipe therein, feed and discharge pipes connected with the reservoir, a rotary valve to control communication between either of said pipes and the reservoir, a spindle whereon said valve is mounted, a pump for forcing liquid through the feed pipe into the reservoir, a gravitally-acting locking device for said pump normally held in raised position by the valve spindle but released upon rota tion of the latter to drop into active position, and a second locking device also actuated consequent upon such rotation to prevent adjustment of the overflow pipe.

12. In a liquid dispensing apparatus, a reservoir having a vertical series of graduations marked therein in ascending order starting from a zero graduation located substantially level with the bottom wall of the receptacle, said wall having an opening therein; an overflow pipe movable vertically through said opening to positions alining with said graduations and having its upper edge normally at the level of the zero graduation; feed and discharge pipes connected with the reservoir; valve means for controlling communication between said feed and discharge pipes and the reservoir; a pump for forcing liquid through the feed pipe into said reservoir; a device for setting the overflow pige; and a common operating element between said pump and setting device.

13. In a liquid dispensing apparatus, a reservoir, an overflow pipe movable there into to diflerent positions, corresponding to different definite quantities of liquid to be dispensed, feed and discharge connections associated. with the reservoir, a pump for forcing liquid through the feed connection into said reservoir, a. device for setting the overflow pipe and embodying an element connected to move in unison with said pipe, and means carried by said movable element for operatively engaging the actuating element or" a counter or register a number or times depending upon the extentof its movement.

14. In a liquid dispensing apparatus, a reservoir, an overflow pipe movable thereinto to different positions, corresponding to different definite quantities of liquid to be dispensed, feed and discharge connections associated with the reservoir, a pump for forcing liquid through the feed connect-ion into said reservoir, a device for setting the ing element ofacounter or register a number of times depending upon the extent of its movement.

In testimony whereof I affix my signature.

' TOROUATO DI TELLA. 

